 From the inputted time and location and the star's altitude and azimuth the telescope mount will know its orientation to the entire sky and can then find any object.For accuracy purposes, a second alignment star, as far away as possible from the first and if possible close to the object to be observed, may be used.This is because the mount might not be level with the ground; this will cause the telescope to accurately point to objects close to the initial alignment star, but less accurately for an object on the other side of the sky.